<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #btn {
            width: 300px;
            height: 100px;
        }

        #box {
            margin-top: 20px;
            width: 300px;
            height: 400px;
            border: 3px solid red;
        }
    </style>
</head>

<body>
    <!-- 1 -->
    <button id="btn">点我创建动态的无序列表</button>
    <div id="box"></div>
    <script src="../js/list.js"></script>
</body>

</html>